Pressure lamp or stove



4 Sheets-Sheet l INVENTOR ATTORNEY T. F. GILES \\\.Y 5 Ill 17 THOMAS FRANc/s GILES BY Mm m PRESSURE LAMP OR STOVE Filed Dec. 18, 1936 July 9, 1940.

July9, 1940. 1F, G s 2,206,949

PRESSURE LAMP OR STOVE Filed Dec. 18, 1936 4 Sheets-Sheet 2 INVENTOR THOMAS FRANCIS GILES ATTORNEY July 9, 1940. s 2,206,949

PRESSURE LAMP on STOVE Filed Dec. 18, 1936 4 Sheets-Sheet I w M u INVENTOR THOMAS FRANCIS 611.55 BY Mil @f/ZQ ATTORNEY PRESSURE LAMP OR STOVE Filed Dec. 18, 1936 4 Sheets-Sheet 4 INVEN TOR THOMAS FRANCIS GILES ATTO R NEY Patented July 9, 1940 a'i'lE -STATESv PRESSURE LAMP on STOVE Thomas Francis Giles, Greenford, England, as-

signor to The Mantle Lamp Company of America, Chicago, Ill., a company of lllinols Application December 18, 1936, Serial No. 116,451-

In Great Britain February 18,1936

9 Claims. (0]. 158-421) This invention relates to lamps and stoves of the kind adapted to burn oil or spirit under pressure and wherein the fuel is conducted from the pressure reservoir through a vapouriser heated during normal operation by the heat of the burner and/or mantle.

Hitherto in pressure lamps and stoves successful operation has been most frequently impeded by the nipple orifice on the upper end of the supply conduit becoming choked. This orifice being of extremely small diameter is easily obstructed by fragments of carbon or impurities in the fuel and owing to its position adjacent the vapouriser is difficult of accessforcleaning which ordinarily entails dismantling of the burner parts of the" lamp.

In order to overcome the disadvantage above referred to the present invention provides a pressure lamp or stove of the kind above described having a needle for cleaning the nipple orifice of the fuel supply conduit wherein the needle is capable of manual operation from theexterior of the lamp or stove against the action of resilient means disposed within the fuel reservointhe said resilient means restoring the needle and operating means automaticallyto normalpositions after operation.

The invention also consists in a pressure lamp or stove of the kind described having a cleaning needle and a valve carried at the upper end of a rod extending vertically through the fuel supply conduit and adapted respectively to clean and" close the nipple orifice at the upper end of said conduit, the said rod being raised through the 3 mediumof a rocking device controlled by resilient means both disposed within the fuel reservoir,

the said rocking device being operated from the exterior of thelamp or stove and the parts! being restored automatically by said resilient means, tov open position after operation.

The invention further consists in a pressure lamp or stove of the kind described having a cleaning needle and valve element carried at the upper end of a rod extending vertically through 1 the fuel supply conduit and adapted respectively to clean and close the nipple orifice at the upper end of said conduit, the said rod being raised and lowered by manually operated meansand resilient devices respectively, said resilient devices includ- 4 ing a metallic bellows interposed in the reservoir. for the purpose of closing the valve automatically should an excess pressure be createdin the reservoir.

Reference will now be made tothe acompanyc ing drawings which illustratebyway of example construction according to the invention and in which: v

Figurelis a sectional elevation of a pressure lamp,;

Figure 2 is at right angles to Fig. 1,

, Figure 3 is a sectional elevation showing a modification of the lamp shown in Figs. 1 and 2,

Figure 4 is a sectional elevation of an alternative form of construction, r

Figure 5 is a partial sectional elevation showing the operative positions of the parts shown in Figure 4 and Figure 6 is a: detail view taken on the line 6--6 of Fig. 4 of the means for controlling the movement of the cleaning needle.

Referring first to the construction illustrated in Figs. 1 and 2; there is disposed within the reservoir l of a pressure lamp an expansible metallic bellows device 2 enclosed-withinv a casing- 3 depending from. the cover of the reservoir I The bellows device 2 is fixed at its lower end to a vertically slidable rod 4 which extendscentrally through thecasing and the-bellows and passes at itsupper end through an adjustable screw threaded sleeve 5 to the exterior of thereservoir where it is provided with a nut and collar 6 beneath which bears one end of anoperatinglever 1, thislever being pivoted at 8 between. cheeks 9 of. a housing element 10 which is, secured to the cover of the reservoir 1 by means such as'rivets II. The lower end of the rod' 4 1s connected to an extension l2 whose lower end. isfixedto: a plate l3 whose opposite end is'connecte d to the base of a rod l4, which extends vertically through a fuelfeed conduit l5 passing upwards through the cover of the reservoir I, and entering; the upper portion of the lamp housing at Ifiwhere its upper end is connected bymeans of a tubularcoupling ll with an upper fuel feed conduit |8- whose upper end enters a housing!!! Whichterminates'in'a nipple through which the vapourised fuel is supplied tothe mixing tube 2|.-

a partial sectional elevation taken r The upper end of the rod l4; bears a valve" member 22 capable of closing the orifice'of; the

nipple 20 whilst the valve itself terminates in a needle or'pricker 23? which is of. such dimensions as-to be capable of passing through the nipple for the purpose of cleaning it.

The vapourised fuel is mixed air'in the tube 2| and passes through a: passage 24 to aburner 25 and mantle-26. Thereser voir I is also provided witha combinedzfilling device-and pump for preheating purposes.v

Within the metallic bellows is disposed a coiled spring 2a, the compression of which is adjusted by means of the screw-threaded sleeve 5 and which serves to prevent collapse of the bellows due to the pressure in the reservoir I under normal working conditions, but the springs preferably so adjusted that when a predetermined pressure is reached in the reservoir, the resistance of the spring is overcome and the bellows 2 partially collapsed so as automatically to close the valve 22 and put the lamp out of operation.

The bellows device 2 also operates as a seal to prevent leakage of vapour from the reservoir I.

In the operation of the device above described cleaning ofthe nipple orifice is effected by downward pressure applied to the outer end of the lever which lifts the rod 4, plate I3 and rod I4 to push the needle 23 through the nipple orifice 20. lows device 2 and spring 2a so that when the pressure on the arm I is relaxed the bellows and spring restore the parts to normal positionto open the nipple orifice 20. By maintaining pressure on the lever I the valve member 22 is caused to close the nipple orifice and the lamp will cease to function and in order to maintain the valve in a closed position when desired means may be provided for locking the lever 'I-temporarily in its depressed position. In order that the device may be accurately adjusted the rod 4 and its extension I2 are provided with a screw threaded connection 29 which enables the range of movement of the valve 22 and pricker 23 to be increased or decreased.

The construction shown in Fig. 3 is an alternative to that shown in Figs. 1 and 2 and is designed to enable the bellows device to be removed in case of breakdown for adjustment or replacement. In this construction the upper end of the casing 3 of the bellows device 2 terminates in a sleeve 30 whose upper portion is flanged at 3| and screw threaded to engage a screw threaded socket 32 formed in the centre of the top of the reservoir I. This socket has an inwardly projecting flange 33 at its base and upon this is disposed a lead or other washer 34 upon thetop of which bears the flange 3| when the device is assembled, the screwing down of the sleeve 30 into position binding the two flanges 3| and 33 into close engagement with the washer to form a fluid-tight joint.

In this construction the downward movement of the pricker rod is limited by a shoulder 35 on the extension I2 coming into contact with a fixed guide 36.

An advantage of the arrangements above described with reference to Figs. 1-3 is that should a predetermined limit of pressure in the reservoir I be exceeded the bellows device 2 will tend to collapse of its own accord to operate the valve member 22 and cause the lamp to be extinguished.

In the alternative form of the invention illustrated in Figs. 4 and 5 the operating mechanism for the pricker includes a cylindrical sleeve 31 which is secured in the top of the'reservoir I and extends downwards so that its lower end is normally in contact with an arm 31a of a lever which is movable on a fixed pivot 37b and whose other arm 38 is forked and engages the flanged upper end of a sleeve or stirrup 39 (Fig. 6) the base of which is fixed by means of a nut 48 to the base of a rod 4| which is movably mounted within a fuel supply conduit 42. Within the lower end of this conduit is a fixed abutment 43 between which and thebase of member 39 is This action tends to compress the beldisposed a coiled spring 44. The fuel supply conduit 42 extends, as before, upwards through the cover of the reservoir to the upper portion of the lamp where the upper end of rod 4| carries a pricker for cleaning the nipple orifice.

The outer end of the sleeve 31 is normally closed by a screw-threaded filler cap 45 and when this cap is removed the reservoir I can be filled through the opening provided, the liquid fuel entering the reservoir through a number of 'slots or perforations 46 in the sleeve 31. Slidably mounted in the inner end of the sleeve is a plunger 4'! whose outer end abuts against the inner end of a rod 48 which has a head or button 49 at its outer end to enable it to be operated by manual pressure so that when released a spring 50 disposed within the sleeve 31 will restore it to normal position. The spring 50 abuts at its upper end against an enlarged portion 5I of the rod 48 and at its lower end against a closure element 52 having a central passage 53 through which the plunger 41 is slidable.

Within the cap 45 is a washer which seats on the upper end of the sleeve 31 when the filler cap is screwed down in closed position as shown. The filler cap is also provided with a small perforation 55 which allows air escape to relieve the pressure in the reservoir when the filler cap is slackened and the pressure on the washer 54 consequently relaxed. The filler cap is provided with wing elements 55 to facilitate manual operation in screwing and unscrewing the cap and the inner portions of these wing elements are provided with slots 51 which can be engaged by projections 58 on the head 49 when it is desired to lock the plunger 47 in the depressed position to maintain the nipple orifice closed. Figure 5 shows the position of the parts when the plunger 4! has been depressed to cause the pricker to enter the nipple orifice and the valve 22 to close. In this position the springs 50 and 44 are compressed so that when the head 49 is given a partial turn to bring the projections 58 out of' engagement with the slots 5'! both springs will expand and the pricker 23 will be withdrawn from the nipple orifice whilst the plunger 4'! and associated parts will be automatically restored to the positions shown in Figure 4.

I claim:

1. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded collar secured to said tank around said opening and carrying a depending flange, a cy- I lindrical casing secured to said depending flange and having a centrally apertured lower end wall, a threaded sleeve in said threaded collar, a rod extending vertically through said casing end Wall'and said sleeve, 2. disk in the lower end of said casing and secured to said rod for vertical movement with said rod in said casing, a metallic bellows in said casing around said rod and having its ends secured respectively to said depending flange and to said disk, a compression spring around said rod between said disk and said sleeve, a fuel valve operated by said rod, and. a burner supplied with fuel through said valve.

2. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded collar secured to said tank around said opening and carrying a depending flange, a cylindrical casing secured to said depending flange and having a centrally apertured lower end. wall,

a'threaded sleeve insaid threaded collarya rod extending vertically through said casing end wall and said sleeveQadisk in the'lowerend of said casing and secured tosaid rod for vertical movement with said rod in said casing, a metallic bellows in saidcasing around said rod and having its ends secured respectivelyto said depending flange and to said disk, a compression spring: around said rod between said disk and said sleeve, a fuel valve operated by said rod, aburner supplied with fuel through said'valve, a housing-element above said collar and over the upper end of said rod, and a lever pivotally supported by saidhousing element and engagingthe upper end portion of said rodfwherebysaid rod may be raised by manual operation of said lever.

, 3. A liquid fuel burning: device-including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded tubular lsocketnsecured to said tank around said opening, an externally threaded collar engaging the threads in said socket and having a depending flange, a cylindrical casing secured to said depending flange and having a centrally apertured lower end wall, said cylindrical casing having an outer diameter smaller than the opening in said socket, said collar having an internally threaded aperture, an externally threaded sleeve engaging the internal threads in said collar, 2. rod extending vertically through said casing end wall and said sleeve, a disk in the lower end of said casing and secured to said rod for vertical movement with said rod in said casing, a metallic bellows in said casing around said rod and having its ends secured respectively to said depending flange and to said disk, a compression spring around said rod'between said disk and said sleeve, a fuel valve operated by said rod, and 'a burner supplied with fuel through said valve, whereby said cylindrical casing and the said parts connected therewith and contained therein may be removed from and placed in said socket as a unitary structure. v v

4. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top Wall, an internally threaded tubular socket secured to said tank around said opening, an externally threaded collar engaging the threads in said socket and having a depending flange, a cylindrical casing secured to said depending flange and having a centrally apertured lower end wall, said cylindrical casing having an outer diameter smaller than the opening in said socket, said collar having an internally threaded aperture, an externally threaded sleeve engaging the internal threads in said collar, a rod extending vertically through said casing end wall and said sleeve, a disk in the lower end of said casing and secured to said rod for vertical movement with said rod in said casing, a metallic bellows in said casing around said rod and having its ends secured respectively to said depending flange and to said disk, a compression spring around said rod between said disk and said sleeve, a fuel valve operated by said rod, a

burner supplied with fuel through said valve,v

5. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening'in its top wall, an internally threaded tubular. socket secured to said tank around said opening, an externally threaded collarengaging the threads in said. socket and having a depending flange, a cylindrical casing secured to said depending flange and having a centrally aperturedlower end wall, said cylindrical casing having an outer diameter smaller than the opening in said socket, said collar having an'internally threaded aperture, an externally threaded sleeve engaging theinternal threads in said collar, a'rod extending vertically through said casing "end wall and said sleeve, a disk in the lower end of said casing and secured to said rod for vertical movement with said rod in said casing, a metallic bellows in said casing around said rod and having its ends secured respectively to said depending flange and to said disk, a compression spring around said rod between said disk and said sleeve, a fuel valve operated by said rod, a burner supplied with fuel through said valve whereby said cylindrical casing and the said parts connected therewith and contained therein may be removed from and placed in said socket as a unitary structure, said socket having an inwardly extending radial flange below said collar, and a packing ring between said collar and said radial flange.

6. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded tubular socket secured to said tank around said opening, an externally threaded collar engagingthe threads in said socket and having a depending flange, a cylindrical casing secured to said depending flange and having a centrally apertured lower end Wall, said cylindrical casing having an outer diameter smaller than the opening in said socket, said collar having an internally threaded aperture, an externally threaded sleeve engaging the internal threads in said collar, a rod extending vertically through said casing end wall and said sleeve, a disk in the lower end of said casing and secured to said rod for vertical movement with said rod in said casing, a metallic bellows in said casing around said overthe upper end of said rod, and a lever pivotally supported by said housing element and engaging theupper end portion of said rod, whereby said rod may be raised by manual operation of said lever.

'7. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded tubular socket secured to said tank around said opening, an externally threaded collar engaging the threads in said socket, pressure responsive mechanism carried by said collar and of smaller size horizontally than the opening in' said socket, a fuel valve operated by said pressure responsive mechanism, and a burner sup-- plied with fuel through'said valve, whereby said collar and the pressure responsive mechanism carried thereby may be removed from and placed in said socket as a unitary structure.

8. A liquid fuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded tubular socket secured to said tank around said opening, an externally threaded collar engaging the threads in said socket, pressure responsive mechanism carried by said collar and of smaller size horizontally than the opening in said socket, a fuel valve operated by said pressure responsive mechanism, a burner supplied with fuel through said valve,whereby said collar and the pressure responsive mechanism carried thereby may be removed from and placed in said socket as a unitary structure, a housing element above said collar, and lever mechanism carried 20 by said housing element and connected with said pressure responsive mechanism for manually op= erating said fuel, valve.

9. A liquidfuel burning device including in combination a tank for holding liquid fuel and having an opening in its top wall, an internally threaded tubular socket secured to said tank around said opening, an externally threaded collar engaging the threads in said socket, pressure responsive mechanism carried by said collar and of smaller size horizontally than the opening in said socket, a fuel valve operated by said pressure responsive mechanism, a burner supplied with fuel through said valve, whereby said collar and the pressure responsive mechanism carried thereby may be removed from and placed in said socket as a unitary structure, said socket having an inwardly extending radial flange below said collar, and a packing ring between said collar and said radial flange. 1

. THOMAS FRANCIS GlLES. 

